Steam-locomotive safety appliance



W. M. CAMPBELL AND M. S. SMITH,

STEAM LOC'OMOTIVE SAFETY APPLIANCE.

APPLICATION FILED JUNE 26.1920.

. 1,372,600, Patenwd Mar.22,1921.

14/2 0 mzgg/ UNITED STATES PATENT OFFICE.

WALTER M! cjn'nrrnnnn on em. Jenn, Ann MARVIN s. SMITH, or MGADAM,NEW BRUNSWICK, cannon. V y

certain new and useful Improvements in Steam-Locomotive Safety Appliances and we do hereby declare thatthe following is a full, clear, and exact description of theinvention, such as will enable others skilled use the same. i

The present invention relates renewincomotive safety appliancespand morepar ticularly to a contrivance which may be readily utilized view ofprotecting an engineer, fireman and other men in the cab of said locomotive,uin case of accident, this constituting the principal object ofthe in vention. a 1 i 1 Another objeetwof same is to provide a safety device located within the dome of a steam locomotive and operated on outsideof same, which can :be easilyand promptly reached andoperated by any'oneof the men in the cab, the moment an accidentoccurs. A further and more specific object of the invention is *toxprovide a device within the dome, withoperating means outside the same, which can be instantlyreached by any one of thetmen in the tab, in view of'cutting OK the supply of dry steam from said demo to the cab, andyfrom thereto the 'diiferent parts of the engine', the' moment an accident, or more' particultvrlly a leakage of steam, occurs at any place throughout the pipe connections, or otherwise, outside of the dome. A still further object of this invention is to provide a safety: contrivance within a dome and operated outside of same, which will have practically the same stability and resistanceas the domeitselfp It is a lrnown fact to the men familiar with the trade, in thejart of which this invention pertains, that the dome on a steam locomotive is one of the most resisting parts of the machine, while the cab and its contents are generallyone of the first things that yield incase of accident, therefore, the

p Specification of Letters Patent.

Application filed June 26, 1920. Serial No. 392,123.

'srnhn nocomorivn sArE'rY Hemmer.

Patented 192:1.

reason for combining the safety appliance embodying this invention with the said dome. i l

From the dome, the dry steam is led through one or a plurality of pipes,- to the cab, from where it is distributed, under controlhngmeans, to the various parts of the engine requiring it. The pipes leading the dry steamto the said variousparts of theengine are, :WhGIl the locomotive is in motion,

i under a continual and tremendous vibration, 1n the art to which it appertainsto make and a and, therefore, or forother reasons, it often happens that a pipe containing the steam underpressure Wlll burst, or that a joint willgive way, sometimescausing the men in the cab to he scalded, or,to here'ndered absolutely helpless with regard to making any efforts to overcome the accident; many engineers and firemen were nearly or totally scalded to death in such occurrences before any assistance could be givento them, often su ppjlyiof stealnwas exhausted.

such f assistance being possible only after the i i Therefore, with. a safety device including such. objects as are hereabove and will be hereafter disclosed as the description of samecoi itinues, all that is required, themoment accrdent occnrswithinrhe cab, is

to have one 'oii themen therein rush outtoward the dome and there instantly cut off, by means of the contrivanee embodyiu this invention, theisuppl'y of dry steam. ihen,

after, themenare out of dangerflthjey can effectively proceed toward *m'alring the re qtnredrepairs. l i

In the hereunto: annexed drawings t Figure 1 is a partial sideelevation of a locomotive showing more particularly the dome thereof in part section with the device interiorly adapted to same, 1

Fig. 2 anenlarged sectional view of the device embodying the present invention. Fig. 3 isasi de elevatioiii iirpartial section of locomotive showing the device interiorly adapted to theshell of theboiler; and,

Fig. 4 is a sectional view taken through the steam dome showing thefdevice in elevati'on;

Reference is now to be had more particutlarlyto the above drawingswherein like and corresponding parts are designated by simi lar reference characters throughout the several 7 views.

Numeral indicates the dome properly adapted to the longitudinal boiler 11 of the locomotive. Numeral 12 shows the cab of vthe locomotive adapted at its rear end to shelter the engineer and fireman. Numeral 13 illustrates a steam pipe conduit. One end of same is usually adapted to float free within the dome at the upper part of same where the steam is in a drier state, and, provides for supplying said steam to a controllable distributing device 14, from where the steam is regulated and sent to the dif- :ferent parts of the engine.

, Sometimes there are more than one steam conduit pipe for leading the dry steam from theidome to the cab, where the distribution is then controlled. r

The present invention comprisesa box 15 provided with a steam inlet 16, a steam outlet 17, and means for controlling and regulating-theoutlet of said steam.

These means 'are herein embodied by a partition 18 within saidbox. A portion of said partition is perforated, as shown by numeral;19 andserves asia seat forthe valve element20. This valve element s revolublyconnectedto the end of a metalllc spindle 21; which is: adapted to project through a steam tight joint 22 on theoutside of the dome. The outlet end of same carries a crank handle 23.. Said spindle the crank handle 28 to the having threaded engagement within the neck 24 of the device is adapted by turning rightto bring the face 20 in contact with its seat 25, thereby .efiectively obstructing the passage of the-dry steam from the dome into the pipe conduit 13.. v

l with a flange 26 rior28 of said box; said hole provides for thethrea ded' engagement of the pipe stem 16whichis made to project as high as possible within the dome, in order to collect the steam in its driest possible state.

Thelower wall 29 of said steam box 15 is also provided exteriorly with a boss or a plurality of bosses 30, having a hole formed therein and communicating with the capacity 3l-of said box. The pipe stem 31 is thereby made, through, a rigid connection, tocommunicate with the capacity 31 of the steam box 15, which capacity, when the face 20 has been removed from its seat 25,

. through the turning to the left of the crank handle 23, receives through the opening 19 the dry steam unobstructedly admitted through the inlet 16, into the capacity 28. The steam under pressure is thereby allowed to flow through the pipe stem 31, serving as an outlet, into the pipe conduit 13, from where it is led to the steam distributing and regulating device 1 1 within the cab.

In the hereabove description and the hereunto annexed drawings have been shown a simple and preferred form of the invention. It is however understood that no limitation is necessarily made to the precise structural details therein embodied, but the right is hereby reserved to any changes, alterations or modifications to which recourse may be had that come within the scope of the claims without departing from the spirit of the invention or sacrificing the eiiiciency of the same.

Having thus fully described our invention, what we claim as new and desire to secure by Letters Patent is 1. A device of the character described comprising a dome adapted to collect the dry steam from the boiler of a locomotive, a steam box rigidly connected to the interior vertical wall of said dome, inlets and outlets formed with said box, and means for cutting off the flow of dry steam from dome 7 through said box.

2. The combination with a dry steam dome on a locomotive of a steam chest interiorly adapted to said dome, said steam chest provided with inlets and outlets for the fiow of dry steam from said dome to the cab of a locomotive, and, means for cutting ofi within said steam chest the flow of said dry steam.

3. The combination with a dry steam conduit pipe adapted to collect the dry steam from the dome of a locomotive, of a device located within and rigidly fixed to said dome, said device having an inlet and outlet for the flow of dry steam from the dome to the cab of the locomotive, and means for cutting old the flow of said dry steam, from the said dome through the said device.

4:. The combination with a dry steam dome on a locomotive of a device adapted for location within said dome and rigidly connected'to same, said device comprising an inlet and an outlet for the flow of the dry steam from dome to cab of locomotive and means outside of said dome for instantly cutting off said flow.

5. The combination with a dry steam dome on a locomotive of a steam box having rigid connection with the inner vertical wall of said dome, said box comprising two inner capacities separated by a partition, an aperture formed in said partition, an inlet opening adapted to communicate with one of said capacities, an outlet opening adapted to communicate with other of said capacities and means for obstructing the communication between the two said capacities, thereby cutting ofi the flow of dry steam from the dome to the cab of a locomotive.

6. The combination With a dry steam conduit pipe in a locomotive, of a steam c0ntrolling device comprising an inlet and an outlet for said dry steam, and means for quickly cuttingofi same in case of accident, substantially as described and for the pur 10 pose specified.

In Witness whereof we have hereunto set our hands.

WALTER M. CAMPBELL.

MARVIN s. SMITH. 

